emerald swift habitat...........

could someone please help me in finding info on the specific type of habitat the emerald swifts come from?... i am enlarging my pairs area.... and wish to make it look more like the region they are from...... i have had the pair now for a year.... and they have breed again, i look to have some babies in the next couple of weeks and wish to start on the adults new habitat...thank you in advance for any help that can be given,cilene